In the current research project, we have prepared a novel Sb@C nanosphere anode with biomimetic yolk-shell structure for Li/Na-ion batteries via a nanoconfined galvanic replacement route. The yolk-shell microstructure consists of Sb hollow yolk completely protected by a well conductive carbon thin shell. The substantial void space in the these hollow Sb@C yolk-shell particles allows for the full volume expansion of inner Sb while maintaining the framework of the Sb@C anode and developing a stable SEI film on the outside carbon shell. As for Li-ion battery anode, they displayed a large specific capacity (634 mAh g(-1)), high rate capability (specific capabilities of 622, 557, 496, 439, and 384 mAh g(-1) at 100, 200, 500, 1000, and 2000 mA respectively) and stable cycling performance (a specific capacity of 405 mAh g(-1) after long 300 cycles at 1000 mA g(-1)). As for Na-ion storage, these yolk-shell Sb@C particles also maintained a reversible capacity of approximate 280 mAh CI at 1000 mA g(-1) after 200 cycles.
South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. 增强组织信息的名称 South China University of Technology
通讯作者地址:Zhu, M (通讯作者)
South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China. 增强组织信息的名称 South China University of Technology
通讯作者地址:Yu, Y (通讯作者)
Univ Sci & Technol China, Dept Chem & Mat Sci, Chinese Acad Sci, Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China. 增强组织信息的名称 University of Science & Technology of China Chinese Academy of Sciences
通讯作者地址:Yu, Y (通讯作者)
Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany. 增强组织信息的名称 Max Planck Society
